Printing device



C. CHISHQLM PRINTING DEVICE Nov. 16 192s. 1,607,388

Filed Nov. 2, 1925 3 Sheets-Sheet 1 llll l ill fik' Suva "tot 0. CHISHYOLM Nov. 16

3 Sheets-Sheet 2 I Filed Nov. 2 1925 Nov, 16 1926. 1,607,388

C. CHISHOLM PRINTING DEVICE Filed Nov. 2, 1925 5 Sheets-Sheet 3 Patented Nov- 16, 1926.

UNITED STATES o FFLC .onrrroiv oHIsrIoLM, or CLEVELAND, onro, ASSIGNOR fTO T E AMERICAN MULTI- I ennrn ooivirA-ivnor CLEVELAND, orrro, A ooRronArIonoroni-o.

PBINLIING DEVICE.

Application filed November 2,;1925. ;;Seria1;l I o..-66,2,2;7.

This invention relates to aprintingrdevice of the general type wherein raised printing members asembossed strips, are mountedon a rotary drum and ooact with a suitable platen,.especially when such-a device is in the simple form adapted iforoflice printing. Anobject-of the invention is-to provide simple means whereby a page wider thanusual may be printed withoutrequiring an increase in-the width of the niaohine. Another-objectis -to provide very simple means for making a tabular form with columns accurately aligning.

,In carrying'out-the invention, I provide a suitable rotary drum having a removable segmentadaptedjto carry the;'printing lines, which segment :is surmounted by-an inking ribbon \carried by spools :mounted in the drum, and such device is adapted to coact, with aa-otary platen, as'the-drum is rotated. The. device, accordingly-partakes o f:the charactorv of a-inultigraph printing'machine. Instead, however, of making the 'typeholding segment semi-cylindrical as in the multigraph, I extenditanateriallylbeyond a half cylinder, and I arrange undercut ribs extending ,arcuately about the surface of the segment :instead of parallel with the axis, and instead of-type between ;the;ribs, I mount directly ontheribs, curved embossed printing strips.

I may divide the form into columns by means offiat strips of less height than the embossed characters whichfiat strips extend transversely of the embossed strips, and are provided on their ends with means for engaging overhangingribs ofthe segment. {By this means I am. able to-build up on-the -seg- .inent a tabular printing form accurately aligned.

The printinglines may extend fora considerable distance in excess of a semi-circle, enabling merto print apage which is mate rially wider than the length of thedrum, moreover, by reasonof ,portions of several lines coacting with the platen at the same time the depth of impression is substantially even irrespective of occasional short lines.

The features-above referred to arehereinafter more fully explained in connection with the embodiment illustrated in the drawings. v

Inthe drawings, Fig. lisa sideielevation of a printing device having my segment with arcuate ribs; Fig.2is a crosssectionsame as indicated by the line 22 on .Figzl; Rig. 3 is asection onthe reduced scaleof thestrip holding Segment; :Fig. ,4 isa sectional perspective of a portion .ofsaid segment, the plane of the section being parallel .with the axis; Figs. 5 and 6 .arefr-agmentary crosssectlons of thesegment in -planestransverse to the axis; Fig. 7 is a development .of ;the segment, showing a tabular printing form mounted thereon; .Fig. 8 is a longitudinal section through the segment ,intermediately broken. away andcshowing.therelation fofithe positioning strips; Fig. 9 is a perspectiveof one of the ,positioning strips.

As shown inFigsQl and 2, 10.indicate s.the frame of a printing .machine, .11 .the .main shaft journalled therein, 12 a crank for rotatingthe shaft, -13 .a- .pair of skeleton disks rigidly secured to the shaft and hflivii g connectlng cross-rods 14. 'Thecra-nk is .shown as driving a pinion .15 meshing with, a gear 16.0n one of thedisks ;1 3. l

The segment is designated20 and compr ses aewall portion extending @for more than a rsimifcircumference and provided on its exterior With dove-tailed or overhanging ribs 21; arcuately arranged,par;allelwith-each other, and on ,its interior with transverse webs 2-3. The webs 23,1nayoonveniently be plates ,made-separatelyfrom, thearcuate wall and suitably secured against annular :Shoulders on the inner 1Surface of that wall as shown fin Eig. .3. Near its ends the inner surface of the cylindrical wall bears on {the rotary, disks 13, while the webs 23 may. bear on the. rods 14. The segment maybe 3 held in placeby ,springhooks 30,pivot,ed to ,the seg ment.by means of a rod 31 extending across the vwebs and at ,its' ,other end springing around the shaft 1,1 orasleevethereon, after the vmanner of Patent No. 1,122,728 issued December .29, 1914, to my assignee, The American .Multigraph Company.

The end disks 13 oftheskeleton drum are Shown as carrying; .apair. of; ribbon spools .40 from which an inking ribbon 41 extends about-theprinting form. =Sueh form coacts Witha rotary platen 4L5 suitably carried by the fram'e, and geared with gllhfi skeleton drum. The .machine is accordingly,- adapted When-the crank is-rotatedto print-on paper ,fed between the v drum t and platen.

between them, the final cut of the milling machine being by an inclined thin cutting disk. The desired distance between the ribs allows sutiicient space for his cutter. The ribs have their outer surface truly cylindrical, then for a short distance they have edges at substantially right angles to the outer surface, and then the opposite sides of such rib converge by surfaces which are zones of a cone, all as clearly shown in Fig. l.

The printing members comprise embossed strips having a single row of upwardly extencing characters 51 thereon and having the edges 52 of the strips ezrtendin away from the embossed surface and inclim'ng inwardly toward each other. Such a strip may be made by any suitable machine, as for instance, the embossing machine forming the subject matter of my Patent No. 1,557,754 issued October 20, 1925, and when made respond to claim 205 of that patent.

The e nbossed strips when produced are preferably straight, but are made of comparatively soft material, as aluminum or zinc, and when shoved onto the arcuate ribs 21 are correspondingly curved thereby to snugly embrace the ribs, as shown. To enable the strips to be conveniently inserted I prefer to cham'ler or round oil" the ribs at one end as indicated at25 in Fig. 6. The other edge of the segment is provided with a suitable stop as for instance a bar held to the segment by screws 28 and overlapping the ends of the ribs, thus causing the ends of the strips which abut the bar to accurately align.

To enable the strips to be accurately positioned and held on the segm nt, so that the characters of one line may align with those of another, which is very important in tabular numeral work, I provide intermediate locking strips illustrated at in Figs. a, 7, 8 and 9. These strips are thin ribbons of steel and each is provided at one end with an inwardly inclined portion 61 adapted to lie parallel with the under'face of a rib and at the other end with a portion 62 which e2:- tends inwardly at a lessacute angle than the end portion 61 and then is curled slightly outwardly at its extreme end 63. The length of the fiat portion of such strips is equal to the width, parallel to the axis, of the face of several ribs plus the distance between these ribs. It results therefore that when the end 61 is hooked over a rib, the end 62 may be sprung beneath the opposite edge of the distant rib, eiiectively holding the strip in place, as shown in Fig. 8. The angle of the end portion 62 while sutiicient to hold the strip in place, is chosen with reference to its being readily sprung into place, and this installing movement is facilitated by the outwardly curled extreme edge 63.

I find that it is entirely practicable toposition the printing strips on the entire face of the segment by means of strips 60 arranged in sets of two each, each strip of such set having its ends 61 hooked into the central channel 24 in the segment and having their ends 62 sprung into engagement with the outer surface of the extreme ribs 21.

The printing strips, when produced for mounting in any column on the segment, are properly of the same length, so that a succession of them may be abutted at their ends by the same transverse holding strip 60.

Thus, as shown in Fig. 7, the strips carrying the different names are continued by blank spaces in the embossing machine so that they all have a length as great as the longest line produced; similarly the numeral strips have a length corresponding to the largest numbers of numerals to be used. It is in connection with numerals that the column alignment is most important. Accordingly if the maximum number of digits is six' each strip irrespective of the digits appearing thereon, will have a length corresponding to six digits and the numerals will be embossed on it in proper position. When these numeral printing strips are placed on the segment and positioned by the transverse strips, the numorals of successive lines will accurately register in column.

will be seen that by my system, I am enabled to print a wine range with a comparatively small machine, and to print it with a very even impression, by reason of the pressure usually coming on a large number of lines instead of on one line at a time, as in the usual multigraph. In addition to these advantages, T can lock the form very accurately in position and produce numeral tabular work in proper columns.

Having thus des ribed my invention, I claim:

1. In a printing device, the combination of a stifi type holding segment having continuous overhanging ribs extending arcuate ly thereon, and embossed printing strips mounted on said ribs.

2. In a printing device, the combination of a segment having a rigid cylindrical wall with integral parallel continuous overhanging ribs extending arcuately about the wall and arcuate embossed printing strips mounted on said ribs.

3. In a printing machine, the combination with a platen and rotary shaft, of a segment mounted about said shaft for rotation thereby in coaction with the platen, said segment having a cylindrical wall with external ribs extending arcuately parallel wit-h each other, each rib having inwardly beveled side surfaces and having a base continuously connected with the segment, and embossed printing strips mounted on said ribs.

i. In a printing device, the combination with a rotary skeleton drum, of a segment mounted thereon and resting on the drum substantially in a diametric plane and hav ing a partially cylindrical wall extending well beyond said diametric plane and having arcuate holding members on the outer surface of said wall extending substantially from one edge to the other, and arcuate embossed strips on the holding members.

5. In a printing device, the combination of a segment having parallel arcuate ribs thereon, embossed printing strips mounted on said ribs, and a terminal bar carried by the segment and extending across the ends of successive ribs to form a stop for the strips.

6. In a printing device, the combination of a rigid segment having a partially cylindrical wall, parallel arcuate ribs thereon integral with the segment and continuously connected therewith at their bases, and embossedstrips lying on said ribs and forming a printing surface, the ribs at one end being cut away to enable the ready insertions of the embossed strips.

7. In a printing device, the combination of a printing member having arcuate strip holding means, embossed strips in arcuate form mounted thereon, and a positioning strip extending transversely of the embossed strips and having inturned ends occupying the channels between the holding means.

8. In a printing machine, the combination of a member having parallel ribs with inwardly converging sides, embossed printing strips mounted on the ribs and having downwardly converging edge flanges engaging said sides, and a.transverse positioning strip extending across the ends of a plurality of embossing strips and having inturned ends occupying channels between some of said ribs. 7

9. In a printing machine, the combination of a segment having parallel ribs with their sides converging leaving between them open channels with flaring sides, arcuate embossed printing strips having inwardly flanged edges underhanging the converging sides of the ribs, and transverse holding strips lying on the faces of several ribs and having inturned end portions occupying corresponding channels and held in place by engagement with the inclined under surfaces of the ribs.

10. A member having parallel ribs with underhanging edges, embossed strips on said ribs, having edge flanges underhanging the edges of the ribs, and a positioning strip having a flat portion of less height than the printing characters and 0f the a length corresponding to the width of a plurality of ribs plus the intervening spaces and having inwardly turned end portions, whereby the strip may position a plurality of embossed strips.

11. In a printing device, the combination of a member having parallel ribs with converging side walls, embossed printing strips mounted on the ribs and having converging edge flanges coacting with the side walls and a transverse positioned strip having inwardly turned ends to engage opposite faces of two of the ribs, one of said ends having its extremity curved outwardly to facilitate placing the strip.

12. In a printing device, in combination, a segment having parallel arcuate ribs'with underhanging side walls, arcuate embossed strips mounted on said ribs and having edge flanges engaging the underhanging side walls, a flat transverse strip of less height than the embossed characters and of a length equivalent to the width of the faces of several ribs plus the width of the channels between such faces, said strips having inward-' ly turned ends engaging opposite edges of two ribs.

In testimony whereof, I hereunto aflix my signature.

CLIFTON CHISHOLM. 

